What if there was a machine that could automatically collect rubble from torn-down buildings and transform the material into new bricks? That’s exactly what designers Youngwoo Park, Hoyoung Lee and Miyeon Kim are proposing with their “Return Brick” recycling machine, which could help keep construction materials out of the landfill. The little robotic machine would search for small fragments of brick and concrete, grind them up, and reform those pieces into new Lego-like bricks, which are easier to stack and build with.